The 3M 1440 is a padded earmuff with slim, durable plastic ear cups. Soft foam-filled cushions stay soft after extensive use. Unique tension adjustment system for exceptional individual fit and comfort. Wide padded headband for secure fit. Lightweight at only 8 oz. Tested to ANSI S3.19-1974. NRR 24 dB.**The NRR may overestimate the protection provided during typical use. 3M recommends reducing the NRR by 50% for estimating the amount of noise reduction provided.
